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No. 624,888. Patented May 9, I899.

H. K. C. DE ANGUEBA. VENTILATOR.

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GHQ M1213 NITED STATES PATENT OFFICE.

HERMAN K. O. DE ANGUERA, OF WAKEFIELD, MASSACHUSETTS, ASSIGNOR TO EDWARD DE ANGUERA, OF SAME PLACE.

'VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 624,888, dated May 9, 1899. Application filed May 25, 1897. Renewed November 29,1898. Serial No. 697,802. (No model.) v

.To all wltom it may concern:

Be it known that I, HERMAN K. C. DE AN- GUERA, of Wakefield, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Venskilled in the art to which it appertains to make and use the same.

This invention relates to improvements in ventilators, and has more particular relation to ventilators adapted to be detachably applied to windows.

A It will be understood from the following description and claim.

In the accompanying drawings, forming part of this specification, Figure 1 represents a perspective view of the device embodying my invention in its open position with the curtain partly raised. Fig. 2 represents a rear elevation of the same. Fig. 3 represents an enlarged detail perspective view of the end guards provided with a plurality of adj ustingapertures and a locking-pin, and Fig. 4 represents a central vertical section through my said improvement. Y

1 in the drawings represents the detachingframe of my improvements; 2, the hinged guard; 3 3, the rigid end guards, and 4 the curtain. Said frame 1 is formed of two sections 4 and 5, respectively, hinged together, as at 6, by any suitable form of hinges. The small end section 5 is adapted to be opened in position when the device is applied to the window, so that the frame may extend fully into the respective beads formed on the opposite sides of the windowand be thus held firmly in position. In Old erto hold the small frame 5 in alinement with the frame 4 when in use, the latter is provided with a turn-button 7, pivotally mounted thereon and adapted to engage said frame 5. The frame 4 is formed with an inlet-opening 8, covered byany suitable reticulated material 9 to prevent the entrance of flies or other insects. The respective rigid end guards 3, which are preferably angular in formation, are rigidly secured to the inner face of the frame 1 at the respective ends of the opening 8, while the guard 2 has its lower edge hinged to said frame 4 at the- When it is desired to fully open the ventilator,

bottom of the opening 8 and is adapted to extend up between the rigid ends 3 to a suitable 8. The object of this construction is to prevent the entrance of any direct'draft into the room being ventilated. One'of the said rigid end sections 3 is provided near its upper segmental edge with a plurality of spaced apertures 10, through which a suitable pin 11, flexibly secured to said end by a cord or chain 12, may be passed to engage an aperture 13, formed in one end of the hinged guard. It will be observed from the foregoing that the said guard may be held firmly in any of its adjusted positions either openor closed or at any intermediate point between these posi- 'tions.

I preferably provide the outer ends of the frames 4 and 5 with binding-strips 14, whereby they will fit more snugly between the beads and the window-frame, and thus prevent any rattling of the attachment. The upper and lower edges of said frames 4 and 5 are respectively inclined, as shown in the drawings, so that the frame when applied to a window will assume a slightly-inclined position, with its distance above the upper edge of the opening lower inclined edge resting fiat upon the inclined sill and its upper edge squarely against the flat under side of the window-frame. By

this means the frame is jammed firmly between the respective beads of the windowframe, should it not be of a width equal to the groove of said beads, because of the inclined position assumed by it.

By means of my improvement all .direct draft into a room is avoided and at the same time a perfect ventilatorprovided, which will prevent the entrance of all flies or other insects.

The device is very simple and cheap in construction and operation, but at the same time very effective, as it may be instantly applied or detached from a window and the quantity of air regulated by the adjustment of the hinged guard. By the peculiar construction of the hinged guard, whereby it is caused to extend considerably above the upper edge of the openin g 8, all air entering through said opening is forced upward in an inclined direction, and all direct draftinto the room thus prevented.

roller 43 so thatit may be drawn over the Wire screen. The roller 43 is mounted in the usual manner upon the inside of the guard, so as to lie between the screen and the movable lid. By the arrangement of this curtain the air may be medicated. at will as it enters through 'the reticulated material.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

The combination with an apertured ventilator-frame, of triangular or sector-shaped plates secured to the frame, one at each end of the aperture and forming end guards there for, a guard-plate hinged to the frame below the aperture to swing in and out between the rigid end guards, means for engaging said hinged guard for looking it at any desired adjustment, a reticulated covering for the aperture in the frame, and a flexible, absorbent curtain adjustable on a roller journaled on the frame directly above the aperture therein, for the purpose and substantially as described.

In testimony whereof I have signed this specification in the presence of two subscrib ing witnesses.

HERMAN K. C. DE ANGUERA. 

